[CentOS] Forget SMB password immediately

[Fajar Priyanto]

On Mon, Nov 28, 2011 at 4:22 PM, Guitart Francesc
<francesc.guitart at enise.fr> wrote:
>> if all the user processes are running as the same user ID, how do you
>> expect the file system to know what user is supposed to have access to
>> which share?   what you're asking for is physically impossible.   once
>> user "A" logged on as unix user X opens his user 'ShareA', *all*
>> processes running as unix user "X" will have access to it.   if you
>> thought it worked differently on Debian, you were wrong.
>>
>
> Sorry, maybe I haven't been clear. What I can do with Debian is to
> forget the SMB password every time I get connect to NAS, in such a way
> several network users can use the same local account. While, if I
> understand correctly, you are talking on the assumption of one NFS
> connection.

I don't get it.
1. Why use shared account?
2. If you are using the same account, how can you prevent user from
accessing each other's folder?
/data/userA
/data/userB
The above ownership and permission won't do any good.